Apparatus for erecting composite piles.



.E. 13. WATT. APPARATUS FOR ERECTING COMPOSITE FILES APPLICATION FILED MAY 10. I912.

Patented Apr. 13

- Sawcnl'o: Elihu D. Wail H0141 30 its head at some distance below the ground or water, with outer cylinder B projecting over it and extending above the ground or water, with the rods orlag screws K projecting into outer cylinder B above, and

firmly in place in the wood pile below.

Next, I place in proper place within said cylinder Bthe additional metal reinforcements L and M, which may be accomplished by sliding them down the lag-screws or rods K; and if desired, the metal cylinder N, which is only slightly smaller than cylinder B, so as to slide down into cylinder B without appreciable friction, or allow cylinder :5 to be withdrawn without enough friction to disturb cylinder N in its position. (Cylinder N may be of very thin material, since the pressure of the ground or water is taken by c linder B). Thereafter cylinder N is fille with concrete, using such force as may be necessary to compact it above and about the wooden pile head, which lattermay be beveled off as at P, to-make a more extensive contacting surface, also compacting thecon crete about the reinforcement L and M and the lag screws K. During this concrete filling operation, or at any other time, the outer cylinderB me be withdrawn as by means of the-hooks and cords or cables of earth or water, as wi be fully understood by those skilled in the art.

It will observed that the lag screws said lag-screws project, and means for per- K K serve 'b th as a means to maintain the alinement of the follower with the wood pile during the final driving of pile A and the construction of the concrete structure upon it, and to firmly and permanently unite the concrete structure R with the wood, also that outer cylinder B furnishes an efficient means of guidingthe head of the wood pile, so as to avoid any tendency on the part of the wood pile to lean to one side or the other, thus tending to make the complete composite structure straight and free from turns or bends at the joint.

When the concrete has fully set, the structure' will be complete, and it will embody a rigid, unitary, but composite structure, the,

wooden part meeting local conditions that make its use preferable at the lower end,.

and the upper part of concrete to comply with conditions that make its use advantageous there.

As will be readily understood, my inven- "tion is suceptible of great mechanical variation in form, material and arrangement of parts; it is useful in. all situations where a composite structure of the character indicated is desirable; not merely where earth or water conditions necessitate a wooden lower part and a concrete up er part, but,

for example, where a greater ength of ile 15 required than can be practically supp ied at by a wooden shaft alone, or by a reinforced J or the eyes I, accordin to the conditions concrete pile alone, whether pro-molded or formed-in-place, My invention will be found especially useful when, through threatened or actual sinking of structures already built, it is necessary to drive preexisting wooden piles to a greaterdepth and build up their upper ends to support the existing structure.

'Manifestly, my device, orfollower, may be of any length desired or found necessary in practice, and may be made in longitudinal sections without departing from my invention. 7

What I claim as my invention is:

1. In an apparatus for erecting-piles, the so combination of a cylinder, a head for each endthereof, the lower head being provided f with perforations, lag-screws projecting through said perforations and ada tedfor permanent engagement with a pileead, an outer cylinder and means for withdrawing said lower head through said outer cylinder upon the lifting of the upper head, substantially as and for the purposes described.

2. In an apparatus for erecting piles, a follower comprising means for detachableengagement with a wooden'pile-head, an anvil for receiving force from a pile driver, means for transmitting such force to the wooden-pile head, lag-screws permanently attached to said pile head, a perforated block within said follower through which mitting withdrawing of saidfollower from said wooden pile-head, substantiall'yas and for the purposes described.

3. In an apparatus forerecting piles com posed of a wooden shaftlsurmounted by a concrete shaft, the combination of a series of lag screws driven into saiiil wooden shaft and upstanding from the same, a driving member mounted upon said lag screws comprising a lower head to slide upon said lag screws and to be in contact with the head- I of the wooden shaft, an outer cylinder, an

inner cylinder permanently attached to said lower head, an upper head attached in fixed relationto said inner cylinder and detach-'. ably secured to said outer cylinder substanj tlally as and for the purpose set forth.

4. In an apparatus for erectin com osite piles composed of a wooden sha t and a series of metallic reinforcing rods permanently ailixed to and projecting upwardly from the upper end of the wooden shaft,\1g o comprising means slidably mounted upon said metallic rods and operatively connected to said wooden shaft and a member supported by the wooden vshaft adapted toreceive cementitious material for forming a 125. concrete shaft 11 on said wooden shaft, substantially as an for the purposes set forth.

5. In an apparatus for rectin composite piles compose of a wooden sha and a so? ries of metallic reinforcingrods perma- 13o V mangoes 3 nently aflixed to and' -fpro'eeting upiv'nrdly member slidably mounted upon said metal- 7 from the upper end "of t e wooden shaft, lie structure and adapted to'transmitdriv- .eompri means slidably mounted upon ing force to saidbooden pile and a cylinsaidmz fiic and operatively connected dmeal member connected to the upper end 20 5 'to-said shaft, means ada ted toof the wooden shaft adapted to inclose the tiiansmit force to said w en pile, cementitiousmeterial forming a concrete and a member supported by the wooden shaft upon said wooden shaft in which the shaft adapted-toreceive cementitiousmatesaid metallic structure is embedded, subtial for forming a concrete shaft upon saidstantiallyas and for the purposes set forth.

n wooden shaft, substantially as and for the I In testimony whereofI afiix my signature purpgies set forth. f in the presence of two subscribing witnesses.

6. an apparatus or erecting composite I pileslcomposed of a'woodenshaft and me- ELIHU WATT tallic structure permanently aiiixed to and Witnesses:

5: projecting upwardly from the upper end of r H. D. RAYMOND,

the wooden shaft, comprising a p le driving MAUD M. HOOKER, 

